Gas-valve.



UNITED sgr-Aras PATENT y oEEicE.

JOSEPH WILLIAM GIBNEY, 0E NEW HAVEN, coNNEc'rrcU'r, ASSIGNOR 'ro THE sEN'rINEL MFG. C0., 0F NEW HAVEN, CONNECTICUT, A CORPORATION. v

GAS-VALVE.' y

Be it .known that I, JOSEPH W. GIBNEY, a citizenof the United States, residing at New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Gas-Valves; and I do hereby declare the following, when .taken in connection withthe accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute .part of v this application, and represent, 1n

Figure 1 a view 1n side elevation of a gas-valve constructed 1n accordance with'my invention.

Fig. 2 an edge view thereof, with'the long arm of the valve-operating lever in transverse sectlon. v

Fig. 3 a view partly in side elevation, and

partly in vertical section, showing the valve closed. l Fig. 4 a corresponding view showing the 'valve open.

Fig. 5 a detached view in side elevation of the valve-stem.

Fig. 6 a corresponding view of the valve.

My invention relates to an improvement in gas-valves, th'e object being toprovide a construction which dispenses with the neces- 4 sity of packing the valve-stem.-

With these ends in view, my invention consists in a gas-valve having its valve-stem provided with an annular seal made independent of the valve proper and co-acting with a seat formed independent of the valveseat.

In carrying out my invention as herein shown, the valve-stem 2 is formed above its longitudinal center with an annular seal 3 having its upper end formed with a bevel 4, concentric with the said stem7 and preferably formed integral therewith. The said seal 3 fits snugly into and reciprocates in a circular chamber 5 formed in the valvebodyl 6 and having its upper end contracted to provide a seat 7 for the bevel 4 of the seal 3. The contracted upper end of the said chamber 5 merges into a passage 8 receiving the reduced upper end 9 of the valve-stem 2 and in turn merging at its upper end into the lower end of a conical valveseatlO formed in said valve-body 6 and receiving a conical valve 11 which normally closes a gas-passage 12 intersecting the valveseat 10 and extending at a right angle to the axis of the valve-stem 2. The upper end of the valve-stem 2 co-acts with the lower end vof the valve 11, the two being in close proximity. Upon its upper face, the valve 11 is vfurnished with a concentric shank 13 v-encircled by the lower coils of a helical spring 14 held in place by a threaded cup 1 5. The main portion of the valve-stem 2 has bearing in a retaining-nut 16 screwed into the lower end of the valve-body 6. The chamber 5, the short passage 8 and the bore of the retaining-nut 16, together form the valve-stem 'passage which is generallypacked by packing material or by glands, but -which I seal by the use of the seal 3 upon the valvestem. As shown, the projecting lower endl of the stem 2 is engaged for operation'by the short arm 17 of a lever 18 hung upon a stud 19 in a forked bracket-arm 20 made integral with the body 6, the said lever 18 being furnished with a long operating-arm 21. The valve-body 6 is furnished', as usual, with an inlet nipple 22 and an outlet nipple 23, the latter being furnished, as shown,'

with a jet 24 which may be of vany approved construction. Of course the means employed for the operation of the stem 2 are wholly immaterial, as they have no direct connection with the present invention. When the valve 11 is upon its seat 10, the seal 3 is out of play, as shown in Fig. 3, iii-which position the valve 11 itself prevents'. any leakage of gas downward into any portion of the passage containing the valve-stem. However, when the Valve 11 is lifted ajbove its seat 10, the bevel 4 of the seal 3 is lifted against the bevel-seat 7 formed by contracting the upper end of the chamber 5, whereby the valve-stem passage as a whole is closed and sealed' without the use of anyf of the packings or glands ordinarily employed, the seal 3 acting when the valve 11 is open, to close the passage 8 which is normally sealed by the valve itself.

In a gas valve, the lcombination with a valve-body having a conical valvasent, a

the said Valve, and a valve-stem movable indepondently of the sind valve and located 1n the said -valve-Stem passage in position to 10 .igf tho 'valve from its seat and furnished will a oonoentrlo seal co-aotmg Wlth the sald soalmg Chamber. 

